First detection of the samurai wasp, Trissolcus japonicus (Ashmead) (Hymenoptera, Scelionidae), in Canada

We report the first detection of Trissolcusjaponicus , an exotic Asian egg parasitoid and the primary candidate for classical biological control of the invasive brown marmorated stink bug, Halyomorphahalys , in Canada. Twenty-eight Trissolcusjaponicus emerged from an H.halys egg mass from a site hea...

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Published in:Journal of Hymenoptera research 2019-02, Vol.68, p.29-36
Main Authors: Abram, Paul K., Talamas, Elijah J., Acheampong, Susanna, Mason, Peter G., Gariepy, Tara D.
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description We report the first detection of Trissolcusjaponicus , an exotic Asian egg parasitoid and the primary candidate for classical biological control of the invasive brown marmorated stink bug, Halyomorphahalys , in Canada. Twenty-eight Trissolcusjaponicus emerged from an H.halys egg mass from a site heavily infested by H.halys in Chilliwack, British Columbia, in 2018. This egg mass was deployed and retrieved as part of ongoing sentinel egg mass surveys for natural enemies of H.halys from 2017–2018 in coastal and interior British Columbia (total of 1,496 egg clusters at 16 sites). The identification of T.japonicus was based on biology (high levels of successful emergence from H.halys eggs), morphology, and mitochondrial DNA sequences. Trissolcusjaponicus was not detected at any other survey sites in 2017–2018; however, three species of indigenous egg parasitoids were found attending or emerging from H.halys egg masses at low levels (
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title First detection of the samurai wasp, Trissolcus japonicus (Ashmead) (Hymenoptera, Scelionidae), in Canada
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